平均数的计算公式简介：The mouse was also very courageous. After noticing Fu Jiang, he first wanted to run away, but his tail was stepped on. Knowing that he could not escape, he continued to eat the leftovers in the bowl.
The mouse was also very courageous. After noticing Fu Jiang, he first wanted to run away, but his tail was stepped on. Knowing that he could not escape, he continued to eat the leftovers in the bowl.
